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Poster: Administrator, Curator, or StaffJeff Kaplan Date: Aug 24, 2011 1:28pm
Forum: texts Subject: Re: Image quality problem with PDF's

ok, i used a different setting to create a better pdf. the file is larger but the quality of the photos is much better.

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Poster: DonKrieger Date: Aug 24, 2011 6:58pm
Forum: texts Subject: Re: Image quality problem with PDF's

Thanks again for looking into this, Jeff. I hope you decide to change your standard pdf rendering settings to allow for a fuller colormap. And I hope you will rerender groups of books which you can figure must have lots of photographs in them. I expect that will place a significant transient load on your computing resources and as you point out, the files will be larger. But I think it's worth it for yearbooks, books with art in them, etc. After all, most people who download a pdf are going to that trouble because they want to really go through the book and enjoy it.

I have another post to make and am not sure where to place it, although this forum seems like a good one as you responded so quickly. The post will contain several methods I've found and put in practice which provide very significant efficiencies in handling large numbers of page images. My site is hosted on a cheap shared server with all kinds of limitations includng cpu load and #files. I currently host 8000+ titles comprising 17,000,000+ pages with no problems and very fast response. I'm pretty sure that the approach I'm using would readily scale to handle 10,000 times as many pages so it might be worth considering. I've wanted to publish it, perhaps in IEEE Internet Computing, but haven't taken the time to write it up for a journal. Most of my material comes from the Internet Archive so I would like to share the ideas. Where would you suggest posting them?

Thanks again.

Don
dkrieger AT alum dot mit dot edu

My site is called http://www.donslist.net

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Poster: Administrator, Curator, or StaffJeff Kaplan Date: Aug 25, 2011 7:10am
Forum: texts Subject: Re: Image quality problem with PDF's

The texts forum seems like an appropriate place if you'd like to describe your system in a public forum. You could also send it to info@archive.org. We're always interested in feedback and contributions that might make Internet Archive better, faster and more efficient.

Another option for a permanent archive is to create a white paper and upload it as an item to archive.org. If you do this please let us know the URL so we can take a look also.

Thank you.

This post was modified by Jeff Kaplan on 2011-08-25 14:10:12

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Poster: garthus Date: Aug 25, 2011 1:07pm
Forum: texts Subject: Re: Image quality problem with PDF's

I did my highschool yearbook and scanned it through Irfanview directly as a PDF:

http://www.archive.org/details/Brentwood_High_School_Arrowhead_1970_

This is the better way to do it. I scanned them all as PDF files and then used PDFmerge to create the final PDF's. The Archive had no problem handling them. I also scanned them at 600 dpi.

Gerry

This post was modified by garthus on 2011-08-25 20:07:44

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